61030513780 has 24 divisors (see below), whose sum is σ = 129408394752. Its totient is φ = 24175192992.

The previous prime is 61030513727. The next prime is 61030513783. The reversal of 61030513780 is 8731503016.

It is a super-2 number, since 2×61030513780² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61030513783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14811172 + ... + 14815291.

It is an arithmetic number, because the mean of its divisors is an integer number (5392016448).

Almost surely, 2^61030513780 is an apocalyptic number.

It is an amenable number.

61030513780 is an abundant number, since it is smaller than the sum of its proper divisors (68377880972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61030513780 is a wasteful number, since it uses less digits than its factorization.

61030513780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29626575 (or 29626573 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 61030513780 in words is "sixty-one billion, thirty million, five hundred thirteen thousand, seven hundred eighty".